Dunstan is a surname. Notable people with the surname include:
Albert Dunstan (1882–1950), former Premier of Victoria
Darren Dunstan (born 1972), voice actor
Don Dunstan (1926–1999), former Premier of South Australia
Donald Dunstan (Australian Governor) (1923-2011), former Governor of South Australia
Keith Dunstan (1925–2013), journalist and son of William Dunstan
Ian Dunstan (born 1955), former Footscray ruck-rover
Priscilla Dunstan, developer of the hypothesis of infant speech patterns, the Dunstan Baby Language
William Dunstan (1895–1957), recipient of the Victoria Cross
